Flush-valve.



P. GRABLER.

FLUSH VALVE.

APPLICATION FILED NOV. 9, 1908.

Patented Dec. 29, 1914,

UNITED STATES PATENT oFFreE.

PETER GRABLER, CLEVELAND, OHTO, .ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, TO THE CLEVELAND FLUSHOMETER COMPANY, OF CLEVELAND, OH IO.

FLUSH-VALVE.

Specification of Letters Patent.

Patented Dec. 29, 1914.

Application filed November 9, 1908. Serial No. 461,591.

fulImprovements in F lush-Valves, of which the following is a specification.

This .mventlon relates to improvements in flush valves generally, and particularly to that class of flush valves set forth in. my

pending application 'No. 407,336, filed Feb. 24., 1908, wherein a casing having inlet and outlet openings with a valve seat therebetween, is provided with a cylindrical portion in alinement with the valve seat and surrounding a suspended cylindrical member adapted to receive a plunger carrying a suitable valve which cooperates with the valve seat, and this present application is 'for the purpose of lmproving the device disclosed in that application, by arranging the bearing surfaces between the cylindrical member and the plunger, in a manner such that they are normally coextensive when the valve is not in use, whereby no part of either one is exposed to the collection of sediment contained in the water or thecorrosive ac tion of the water at that time.

Invention also resides in the form of valve employed to cooperate with the valve seat as well as 111) the arrangement of a form of relief valve, which is normally held in a closed position by a spring which in itself, aside from normally holding this relief valve tightly closed, is adapted to cause-the rapid upward movement of the plunger and main valve thereby reducing the period of time consumedin the operation of the flush to a certainty. g

The foregoing operation takes place by reason of the fact that when the relief valveis raised against the spring the energy stored in the spring reacts 1n an upward direction and forces the plunger in the same direction with a quick-movement, resulting in the seating of the relief valve. It is to be understood, however, that this operation takes place while the operating lever is still in engagement with the-relief valve. By the use of the spring described, the plunger moves up quietly and the period of time is therefore more certain.

The invention further resides in the construction and combination of parts hereinafter set forth in the following description, drawings and claims.

Referring to the drawings, Figure 1 represents a vertical sectional View of my improved flush valve; Fig. 2 an elevation of the plunger and Fig. 3 a detail view of the operating lever.

In carrying out my invention, any preferred form and construction of parts may be employed, providing they possess the necessary characteristics, but I have shown one form which meets the requirements with great e'lficiency, and in such embodiment, 1 represents the casing provided with an inlet opening 2, a discharge opening 3, a valve seat 4 between such openings, and a cylindrical portion 5 in alinement with the valve seat. A plug 6 is arranged preferably in the upper part of the cylindrical portion 5, and it is provided with a cylindrical member 7 projecting well into the cylindrical portion 5 and provided with an inwardly projecting bearing surface 8. Slidably mounted within the cylindrical member 7 is a plunger 9, which has a bearing surface portion 10 co-extensive with. and engaging the bearing surface 8, and preferably provided with a plurality of circumferentially isolated pockets therein. This plunger 9 carries a tubular member 11 threaded into it and having a relief valve seat 12 cooperating with a relief valve 13 provided with a stem 11 projecting out through the lower end and limited in its movement by a stop pin 15. A spring 16 is arranged above the valve 13 and is held in engagement therewith by a retaining pin 17 passing across the opening in the tubular member and tending through the walls thereof. The lower end of the plunger 9 is provided with an annular sleeveportion l8 slightly larger ban the valve seat 4 and telescoping onto it and arranged to receive,a gasket 19 which is adapted to engage the valve seat 4.

The cvlindrical member 7 is further proa manner to regulate the flow through said port. Suitable mechanism is also provided for operating the valve and it comprises an operating shaft 24 entering the casing and having secured thereto and Within the casing, an operating lever :25 having a bifurcated end portion for receiving the stem of the relief valve. Each side portion of the bifurcated end portion is in the form of a fork comprising a lower long finger 26 for engagement below a pin 28 carried bythe stem ll and an upper short finger 29 for engagement above the pin 28. By this arrangement the short fingers 29 Will permit the assembling of the device When the lever 25 is shifted into its uppermost position and when the operating device, not shown, is manipulated the relief valve and plunger are raised also. It is quite obvious that by this construction the relief valve, and hence the flush, is at all times under the control of the operator or in other words the flush may be closed automatically or it may be closed manually by the operator. 4

From the foregoing description, it Wil be seen that the bearing surface of the cylinclrical member and of the plunger are both in engagement throughout their entire extent during the period when the flush is not in operation or it might be said under normal condition so that the collection of sediment or corrosive substances upon exposed surfaces may not affect the operation of the Hush. It will also be readily seen that when the relief valve is operated to release the pressure within the cylindrical member and plunger, the tension of the spring will cause this plunger to move upward very rapidly until the release valve is seated, then thethis construction just referred to, actually does prevent the hammering or knocking which is very undesirable in a valve of this type.

Having described my invention,'I claim 1. In a flush valve, a casing having an inlet opening and an outlet opening, a valve seat within said casing and between such openings, a main valve cooperating with said seat, a cylindrical member carried by said casing and having an internal bearing portion and another portion of larger diameter beyond the bearing portion, a plunger carried by said main valve and having a bearing portion equal in extent to that of the bearing portion of said cylindrical member, said bearing portions being coextensive and registering throughout their entire length when the valve is closed, a relief valve for relieving the pressure above the plunger, and means for operating said relief seat, a bearing portion carried by saidplunger and equal in extent to the bearing ortion of said cylindrical member, both of said bearing portions registering throughout their entire length when the valve is in normal or closed position, a relief valve for relieving the pressure above said plunger, and means for raising -the relief valve.-

In testimony whereof I aflix my signature in presence of'two witnesses.

PETER GRABLER.

, Witnesses:

ALTON H. BEMIS, 1 B. W. BROCKETT. 

